BG Trauma Center Ludwigshafen at Heidelberg University Hospital, Ludwig-Guttmann-Straße 13, 67071, Ludwigshafen, Germany.
Arcus Sportklinik, Rastatter Str. 17-19, 75179, Pforzheim, Germany.
Ann Biomed Eng. 2021 Feb;49(2):617-626. doi: 10.1007/s10439-020-02572-3. Epub 2020 Aug 13.
Tendon mobility is highly relevant in rotator cuff surgery. Objective data about rotator cuff mobility is rare. Tendon mobility still needs to be evaluated subjectively by the surgeon. This study aims to establish a porcine animal model for mobility analysis of the supraspinatus. In this context, we introduce a sensor-enhanced, arthroscopic grasper (SEAG) suitable for objective intraoperative measurements of tendon mobility in clinical praxis. Tendon mobility of 15 fresh porcine cadaver shoulders with artificial rotator cuff tears was evaluated using the SEAG. Mobility characteristics (load-displacement curves, maximum load, stiffness) were studied and inter- and intraobserver agreement (intraclass correlation coefficient (ICC)) were tested. Factors with a potential adverse effect (plastic deformation and rigor mortis) were also evaluated. All shoulders showed characteristic reproducible load-displacement curves with a nonlinear part at the start, followed by a linear part. Mean maximum load was 28.6 N ± 12.5. Mean stiffness was 6.0 N/mm ± 2.6. We found substantial interobserver agreement (ICC 0.672) and nearly perfect intraobserver agreement (0.944) for maximum load measurement. Inter- (0.021) and intraobserver (0.774) agreement for stiffness was lower. Plastic deformation and rigor mortis were excluded. The animal model demonstrates reliable and in vivo-like measurements of tendon mobility. The SEAG is a reliable tool for tendon mobility assessment.
肩袖肌腱活动性在肩袖手术中非常重要。有关肩袖活动性的客观数据很少。肌腱活动性仍需要由外科医生进行主观评估。本研究旨在建立一种用于评估冈上肌腱活动性的猪动物模型。为此，我们引入了一种带有传感器的关节镜抓握器（SEAG），适用于临床实践中对肌腱活动性进行客观的术中测量。使用 SEAG 评估了 15 个具有人工肩袖撕裂的新鲜猪尸体肩部的肌腱活动性。研究了活动性特征（负荷-位移曲线、最大负荷、刚度），并测试了观察者间和观察者内的一致性（组内相关系数（ICC））。还评估了具有潜在不利影响的因素（塑性变形和尸僵）。所有的肩膀都表现出特征性的可重复的负荷-位移曲线，在开始时有非线性部分，然后是线性部分。平均最大负荷为 28.6 N±12.5。平均刚度为 6.0 N/mm±2.6。我们发现最大负荷测量的观察者间（ICC 0.672）和观察者内（0.944）一致性都很高。刚度的观察者间（0.021）和观察者内（0.774）一致性较低。排除了塑性变形和尸僵。动物模型可以可靠地进行肌腱活动性的活体测量。SEAG 是评估肌腱活动性的可靠工具。
